摘要
景泰6.2级地震前,震中300km范围内虽有9个地电台,但有短临异常的台站仅三个,且异常时空分布规律性差。由于这些特点,尽管震前已发现了这些异常,但终因不认识其复杂图象而未作出短临预报。本文利用地电异常与断裂展布、发震应力之间的关系研究结果,解释了景泰地震前地电短临异常的时空分布特征,认为这种异常图象是特定构造格局下的真实反映。在此基础上,探讨了震前作出地震三要素预报的可能性。
Before Tianzhu-Jingtai earthquake with M = 6.2, there were 9 geoelectric stations in the range of 300 km from the epicenter, but only 3 stations recorded the short-term and impending anomalies, and the time-space dis riburion regularity of the anomalies is very poor. Dae to these features of anomalies recorded before the earthquake, the complicated patterns can not be recognized and the short-term and impending prediction was not made. This paper explained the space-time distribution features of the short-term and impending geoelectric anomalies before Tiazhun-Jingtai earthquake with M = 62 using the research results of the relation between the geoelectric anomaly, fault distribution and the causative stress, and confirmed that such an anomalous pattern is the real reflection under the special structural framework. Based on this, authors here disccussed the possibility of predicting three elements of the earthquakes before an earthquake.
出处
《地震》
CSCD
北大核心
1993年第2期15-20,共6页
Earthquake
关键词
地电阻率
短临异常
预报
地震
震级
earth resistivity
short-term and impending anomaly
fault distribution
prediction
